She's not proud of it, but she's the one who puts the idea in Sirius' head.

They're sitting around the fireplace one late Friday night and Peter and James are involved in a high-intensity level game of Wizarding chess. Peter's leaning forward on his chair so far that Lily thinks the whole thing is going to collapse and James keeps mumbling to himself and leaning forward to make a move before retracting his head and mumbling some more.

Lily's sitting in between Remus and Sirius on the couch, but she's more focused on watching the chess game than the two of them, who are bickering about something or other.

She's not listening to their argument, until she hears her name thrown into it. Then she tunes back in.

"Nuh-uh, I bet Lily wouldn't think so," Remus says.

"Lily wouldn't think what?" she asks, turning round to look at Sirius.

"Cars, Evans. Cars. Birds love a guy who can drive, right?" He wiggles his eyebrows at her.

"Huh?" she asks and they explain to her that Sirius thinks that getting a car is the best way to land a chick.

"Eh, maybe," and then she says what she could kick herself for saying, "but all the bad boys drive motorcycles."

Sirius' eyes light up and she immediately regrets it. "Did you hear that, Prongs? Lily thinks I should get a motorcycle, not a car!"

Lily rolls her eyes. "I didn't say you should get one! I just said-" But her answer is drowned out by Sirius talking over her.

" Do you still have that Muggle magazine upstairs? Maybe they have the number for a shop I get it from. Or I could make one myself!" Sirius bounds up the stairs, two at a time and Lily can hear him moving the trunks around in the boy's dorm to find the magazine.

Lily sighs heavily and looks at Remus for help, but he merely smiles and shakes his head. His eyes taunt her- you started this, they say. She rolls her eyes again as Sirius comes bounding down the stairs, his wand in one hand and a wrinkled up magazine in the other.

After Peter and James finally abandon their half-finished game of Wizarding Chess and join them on the couch, they all sit around listening to Sirius talk about his newfound love of motorcycles as Lily tries to talk him out of it, but to no avail.

When it eventually comes time for Lily to head up to her dormitories to go to sleep, she gets a hug and a kiss from James, goodnights from Peter and Remus and a "thanks for the motorcycle tip, hon" from Sirius. She smacks him on the head, albeit a bit affectionately and stifles a yawn, trying not to think of the consequences of her actions.